Keyphrases
- labeling scheme
- xml documents
- twig queries
- xpath expressions
- twig pattern
- xml data
- path expressions
- markup language
- shortest path
- efficient processing
- metadata
- relational databases
- databases
- xml query processing
- xml format
- xml queries
- relational data
- xpath queries
- extensible markup language
- collision free
- pattern queries
- probabilistic xml
- navigation systems
- autonomous navigation
- obstacle avoidance
- xml retrieval
- xml databases
- data exchange
- data model
- optimal path
- xml schema
- structured data
- underwater vehicles
- mobile robot
- document centric
- structural join